Forces with National Guardians holding the fort and the other forces were of totally different orders of magnitude.
The Min Province was never a strong province when it came to cultivation. There were no other noteworthy cultivator forces to speak of other than the Southern Shaolin Temple.
Be it the Chen Clan or the Seven Invincible Sect, they were not even a Martial Arts Legend among them, at the moment.
Their claims of wanting to reign supreme all over the province were little more than boasts since there was no one else bothering to put them in their place.
If the Soul-snatcher Sect were to actually invade, those two forces would have crumbled right away. Until the Special Task Force mobilized formidable fighters from the headquarters, there would be no way for them to win against that sect.
If something like that were to indeed happen, then things would undoubtedly be difficult for the Special Task Forces of the Min Province from then on out.